U1186 Code - Lost Communication With Adaptive Cruise Control Module
Quick Answer
The Diagnostic Trouble Code (DTC) sets when the Powertrain Control Module (PCM) doesn't receive a bus message from the Cruise Control Module for a specific amount of time. Common causes include Faulty Cruise Control Module, Cruise Control Module harness is open or shorted, Cruise Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U1186 indicates Lost Communication With Adaptive Cruise Control Module.
- Common causes
- Common causes include Faulty Cruise Control Module, Cruise Control Module harness is open or shorted, Cruise Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U1186 Description
What are the Possible Causes of the DTC U1186?
- Faulty Cruise Control Module
- Cruise Control Module harness is open or shorted
- Cruise Control Module circuit poor electrical connection
How to Fix the DTC U1186?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1186 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the U1186 code?
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Information for Specific Makes
- U1186 Chrysler — Lost Communication With Adaptive Cruise Control Module
- U1186 Dodge — Lost Communication With Adaptive Cruise Control Module
- U1186 Jeep — Lost Communication With Adaptive Cruise Control Module
- U1186 RAM — Lost Communication With Adaptive Cruise Control Module
Frequently Asked Questions about U1186 Code
1. What are the common symptoms of OBDII code U1186 - Lost Communication With Adaptive Cruise Control Module?
- Common symptoms include the adaptive cruise control system not working properly, the cruise control light on the dashboard illuminating, and potential issues with the vehicle's speed control.
2. What are the possible causes of OBDII code U1186?
- Possible causes include a faulty adaptive cruise control module, wiring or connection issues, a software glitch, or a problem with the vehicle's main computer system.
3. How can I diagnose the cause of OBDII code U1186?
- Diagnosing the issue typically involves using a diagnostic scanner to retrieve the specific trouble codes, checking the wiring and connections related to the adaptive cruise control module, and performing a thorough inspection of the module itself.
4. Can I still drive my vehicle with OBDII code U1186 present?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue as soon as possible to prevent any potential safety hazards or further damage to the system.
5. How can I repair OBDII code U1186 - Lost Communication With Adaptive Cruise Control Module?
- The repair process may involve repairing or replacing damaged wiring, checking and resetting the adaptive cruise control module, updating software if necessary, or seeking professional help for more complex issues.
6. Will resetting the trouble code make it go away permanently?
- Resetting the trouble code may temporarily clear the warning light, but if the underlying issue causing the code is not fixed, the code is likely to reappear after driving the vehicle for a period of time.
7. Is OBDII code U1186 a common issue in certain vehicle makes or models?
- This code can be more common in vehicles equipped with adaptive cruise control systems, particularly in newer models with advanced safety features.
8. Can a DIY enthusiast easily fix OBDII code U1186 at home?
- Some simple causes like loose connections or minor wiring issues may be fixable by a DIY enthusiast with the right tools and knowledge, but more complex problems may require professional assistance.
9. Are there any recalls related to OBDII code U1186?
- It's recommended to check with the vehicle manufacturer or the National Highway Traffic Safety Administration (NHTSA) for any recalls related to this specific OBDII code and associated components.
10. How can I prevent OBDII code U1186 from occurring in the future?
- Regularly inspecting and maintaining the adaptive cruise control system, ensuring proper connections and wiring, and following the manufacturer's recommended maintenance schedule can help prevent this code from occurring.
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